305 TBI cam swap
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305 TBI cam swap
I got a 1991 GMC C1500 with 305 TBI, I'm looking at doing some work over the next few months such as cam, heads, intake etc,
So i know the 305 TBI trucks came with a hydraulic flat tappet cam? correct? can they be swapped to a hydraulic roller? is as simple as just swapping cam and lifters?
I'm looking at Comp Cams Thumpr camshaft and lifters #CL08-600-8
So i know the 305 TBI trucks came with a hydraulic flat tappet cam? correct? can they be swapped to a hydraulic roller? is as simple as just swapping cam and lifters?
I'm looking at Comp Cams Thumpr camshaft and lifters #CL08-600-8
#5
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Yep, Vortec heads are great stock head upgrades, but come with the cost of having to change the intake ($$$$) as well. GMPP's TBI intake for Vortec heads is the only one I know of and it's about $400. Add in the cost of the heads, cam, and other misc. stuff then start spending money setting up to tune the thing so it actually runs right - TBI's really do not take well to significant mods without major tuning work - you may as well have done a complete LS swap; more power for your money and believe it or not, easier.
Modding a 305 TBI these days is really throwing money away. It was throwing money away back when they were still a current engine, too, but moreso now.
Richard
Modding a 305 TBI these days is really throwing money away. It was throwing money away back when they were still a current engine, too, but moreso now.
Richard
#6
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Yep, Vortec heads are great stock head upgrades, but come with the cost of having to change the intake ($$$$) as well. GMPP's TBI intake for Vortec heads is the only one I know of and it's about $400. Add in the cost of the heads, cam, and other misc. stuff then start spending money setting up to tune the thing so it actually runs right - TBI's really do not take well to significant mods without major tuning work - you may as well have done a complete LS swap; more power for your money and believe it or not, easier.
Modding a 305 TBI these days is really throwing money away. It was throwing money away back when they were still a current engine, too, but moreso now.
Richard
Modding a 305 TBI these days is really throwing money away. It was throwing money away back when they were still a current engine, too, but moreso now.
Richard
To use vortec heads, the manifold is $450. Over half the cost of a pullout.
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I completely agree with at these post, yes most people throw out the 305 for a 350, yes the 350 makes more torque, and yes an LS swap would be cheaper and more power, I actually planned on doing an LM7 swap but decided I wanted to be different and do something people don't do. build a 305 TBI,
all I want is about 350- 400hp and that is possible on 305's
So does anyone know if a roller swap is as simple as swapping cam and lifter?
Cause I've heard different things, I've heard you can but also heard that u can't do a roller cam without other major mods???
all I want is about 350- 400hp and that is possible on 305's
So does anyone know if a roller swap is as simple as swapping cam and lifter?
Cause I've heard different things, I've heard you can but also heard that u can't do a roller cam without other major mods???
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